mastoid emissary vein

例句：

1. 1.The doctor carefully examined the patient's mastoid emissary vein for signs of infection.
   医生仔细检查了患者的耳突支脉，以寻找感染的迹象。
2. 2.During surgery, the surgeon removed a section of the mastoid emissary vein to relieve pressure on the brain.
   在手术中，外科医生切除了一部分耳突支脉，以减轻对大脑的压力。
3. 3.Mastoid emissary veins are important for blood circulation and can be blocked by certain medications.
   耳突支脉对于血液流动非常重要，某些药物可能会阻塞这些血管。